which isn't rocket science. it's just common sense. from td ameritrade. ♪ let's stay together >>> when you look at this picture, what do you think? at what point was it taken? >> i think we were campaigning in iowa. >> so why were you hugging her so hard in iowa? >> because i love my wife. >> and also, i hadn't seen him in a while. when you're campaigning, we're two ships passing in the night. and the first time i saw him was when i walked on stage to greet him. and that's my honey giving me a hug. >> how do you keep the fire going? >> that's a good question. >> you know, we've been married now 20 years. >> mm-hmm. >> like every marriage, i think, you know, you have your ups and you have your downs. but if you work through the tough times, the respect and love that you feel deepens. >> and then there's a lot of laughter, you know. >> and you're funnier. >> yeah. for the most part. >> everybody thinks he's pretty funny. i'm funnier than people think. >> you are. >> that may be. you may be funnier than people think. >> barbara walters